Counter molding machine



Dec. 23, 1947. w. H. CHAMBERLAIN COUNTER MOLDING MACHINE Filed Sept. 5, 1945 J wcnbr Wmum Heoaea Qwmbeemn HIS HGENF.

Patented Dec. 23, 1947 William Hedger Chamberlain, Higham Ferrers, England, .assignor to W. W. Chamberlain &

Sons,

Limited, 'Higham lFerrers, England, a

British joint-stock company Application September 5, -'194'5,-Serial No. 614,537 In :GreatYBritain August 3, 1944 'Se'ction'l, Public Law '6'9'0, -August 8, 1946 Patent expires August 3, 1964 :6 Claims. (c1. -12-66) 1 This invention-relates to machines for molding shoe h'eel counters, and more particularly to =coii'ri't'ermdldihg machines -oi" the Stewart type such as "described in my 'pri'or "Patents No.

"21 532235, date d "April 4, 19 39, and No. 2,326,437,

dated-ieugustm, 1943.

The invention has for its main object to providei'm'proved means for shaping the projecting {Ed e of the "counter blank by the-descent of the 'slidingdoor or wiper 'whilethe body of the blank "is gripped in the gap between the main parts of the mold, namely '-a pair of jaws rocking inwardly "together-en either side of a center-piece to which =vertic'a1'pressure is-a'ppliedbya plunger operated 'by an eccentric rod 'fr'om the'bottom shaft 'o'f'the machina'as well'known in the art.

"The invention has for another objcctto pro- Vide shaping means for the purpose mentioned, comprising -a member fixed to the wiper and adzirited-tdfitover the projecting top edge of the counter blank, in'combination with a pair 'of side "Dressers slidably'mounted near-the bottom'of the "-wi'pen-and positive means for forcing said pres- "sers agains't the projecting side edgesor wings of "the blank near "theend ofthe downward movepe'ts-extending laterally of the wiper so that'thcir outere'n'ds engage 'the wedge r cam surfaces to produce a positive inward movement as the wiper approaches-the end of its descent.

Other objects and advantages of the invention will hereinafter appear "from the following descriptionand the accompanying drawings -of a preferred embodiment, as applied to a countermolding machine such as described'in my aforesaid patents, to whichre'ference Inay bc had for a fuller-explanation of the molding operation. :In these drawings,

'Figfll isa-half rear elevation-of-the sliding door or'wiper of the molding machine,--the wiperbeing in its lowest position.

v Fig-21st. similar view with the wiper-on its downward stroke.

Fig. 3 is a plan of Fig. -2, showing parts in section.

- Fig. 4-isa side view of FIgHZ'in section on-the -center-line of the wiper, showing also the center 2 piece upon which the counter blank is to be molded.

:As shown in these drawings, the wiper a has its rear face provided with a rectangular cavity or recess b, in which the shaping means are mounted, the top plate or saddle block 0 being fixed at the top of the cavity, for example by screws'd with'countersunk heads; the lower edge of this top plate has a central arched portion'e and two inclined portions f extending almost to the-sides of the cavity, the angle of these inclined portions being for example 22 degrees to the horizontal. The central arched portion eis bevelled at e towards the rear face of the wiper, .-so as to produce an upturned or inclined lip around the-top of the blank during the molding operation.

Below the top plate 0 are two slidable presser blocks or side plates 9, having their upper edges 9 inclined at the same angle as the inclined portions of the top plate with which they are in sliding contact; these side plates have their inner edges-g slightl curved to a concave shape in continuation of the arched portion 6 of the top plat 'and also bevelled towards the rear face to give the desired shape to the sides or wings of the counter blank. These side plates are controlled by :springs h which urge them apart to the limit of the width of the cavity, in which position (Fig. 2) their upper extremities stand clear of-the arched portion e of the top plate by a distance of about three-eighths of an inch, for

example.

At about the middle of their height, the side plates 9 are fitted with rigid tappet rods 2' of rectangularcross-section extending through guide holes-a in the wiper at the sides of the cavity and projecting at the lateral edges of the wiper, preferabl inside-notches or recesses 7' on these edges as to remain within the overall width of the wiperpthe tappet rods'i are inclined at the same angle as'the inclined portions f of the top -plate=and their outer ends 2' are adapted'to engagewithfixed'cams or wedges is upon the wiper guides l, the operative faces of these'wedges being inclined-for example at 67 degrees to the horizontal so that th tappets i are perpendicular to the wedge faces. During the descent of the wiper, and within the last part of its movement, as shown in chain lines in Fig. 2, the tappet ends -i engage the fixed wedges k; the tappets are therefore-driven inwards, as seen in Fig. 1, so as to -force the side plates g together for shaping the sidesor-wings of the counter blank. -On the .return movement, the springsh separate the side 'iplatesg and release-the shaped blank for ejection or removal as soon as the wiper a is raised clear of the center-piece.

Fig. 4 shows the center-piece m rocked forward to support the counter blank (indicated in section at 11) around its upper end for molding by the main jaws in the usual manner, the rojecting edge 11 of the blank being still free of the descending wiper; as seen in this figure, the centerpiece has a curved front 121 designed for the molding of counters for drop-waist shoes, and the side plates 9 have their lower ends cut away as indicated at g to match the curvature of the front m being thus adapted to form drop-waist or curved fronted dies for molding the projecting edge of the counter blank to a corresponding shape towards the ends of the side wing portions.

What I claim is: i

1. In a counter molding machine of the character described, including a wiper adapted to rise and fall over the face of the mold, the rear face of said wiper engaging the projecting portion of a blank gripped in said mold, means for shaping said projecting portion comprising a member fixed to said wiper and adapted to fit over the projecting top edge of said blank, said fixed member being bevelled towards the rear face of said wiper to produce an inclined lip about the top of said blank, in combination with a pair of side pressers slidably mounted near the bottom of said wiper, said side pressers being bevelled to wards the rear face of said wiper, and positive means for forcing said pressers against the projecting side edges of said blank near the end of the fall of said wiper.

2, In a counter molding machine of the character described, including a wiper adapted to rise and fall over the face of the mold in relation to a blank gripped in said mold, means for shaping a projecting portion of said blank comprising a member fixed to said wiper and adapted to fit over the projecting top edge of said blank, in combination with a pair of side pressers slidably mounted near the bottom of said wiper, tappets fitted to said pressers and extending laterally of said wiper, and fixed wedges located in the paths of said tappets, said tappets engaging with said wedges to produce inward movement of said pressers as said wiper approaches the end of its fall.

3. In a counter molding machine of the character described, including a wiper adapted to rise and fall over the face of the mold in relation to a blank gripped in said mold, means for shaping a projecting portion of said blank comprising a saddl block fixed to said wiper and adapted to fit over the projecting top edge of said blank, a pair of side pressers slidably mounted near the bottom of said wiper, spring means for separating said pressers to clear the projecting side edges of said blank during the early stages of the fall of said wiper, tappets fitted to said pressers and extending laterally of said wiper, and fixed wedges located in the paths of said tappets, said tappets engaging with said wedges to produce inward movement of said pressers as said wiper approaches the end of its fall.

4. In a counter molding machine of the character described, including a wiper adapted to rise and fall over the face of the mold in relation to a blank gripped in said mold, means for shaping a projecting portion of said blank comprising a saddle block fixed to said wiper and adapted to fit over the projecting top edge of said blank, a pair of side pressers slidably mounted near the bottom of said wiper, tappets fitted to said pressers and extending laterally of said Wiper. said pressers and tappets being slidable in directions inclined to the horizontal, and fixed wedges located in the paths of said tappets, the inward faces of said wedges being inclined to the vertical, and said tappets engaging with the inclined faces of said wedges to produce inward movement of said pressers as said wiper approaches the end of its fall.

5. In a counter-molding machine of the character described, a wiper adapted to rise and fall over the face of the mold in relation to a blank gripped in said mold, said wiper having a sub stantially rectangular cavity in its rear face, means located in said cavity for shaping a projecting portion of said blank, said shaping means comprising a block fixed towards the top of said cavity and adapted to fit over the projecting top edge of said blank, a pair of side pressers slidably mounted towards the bottom of said cavity, spring means for separating said pressers to clear the projecting side-edges of said blank during the early stages of the fall of said wiper, and tappets secured to said pressers and extending through side walls of said cavity, and fixed wedges located in the paths of the outer ends of said tappets, said tappets engaging with said wedges to produce inward movement of said pressers as said wiper approaches the end of its fall.

6. In a counter-molding machine of the character described, a wiper adapted to rise and fall over the face of the mold in relation to a blank gripped in said mold, said wiper having a sub stantially rectangular cavity in its rear face, means located in said cavity for shaping a projecting portion of said blank, said shaping means comprising a block fixed towards the top of said cavity and adapted to fit over the projecting top edge of said blank, said block having a lower edge including a central arched portion and two inclined portions extendiug'towards the sides of said cavity, a pair of side pressers slidably mounted towards the bottom of said cavity, said pressers havin upper edges inclined at the same angles as and slidable in contact with said inclined portions of said fixed block, and tappets secured to said pressers, said tappets being inclined at the same angles as said inclined portions and extending through side walls of said cavity, and fixed members located in the paths of the outer ends of said tappets, said fixed members having surfaces approximately perpendicular to said tappets, and said tappets engaging said surfaces as said wiper approaches the end of its fall so as to produce inward movements of said pressers in sliding contact with said inclined portions.

WILLIAM HEDGER CHAMBERLAIN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1814,611 Stewart July 14, 1931 2,194,892 Dodge Mar. 26, 1940 435,481 Cote Sept. 2, 1890 365,608 Knox June 28, 1887 1,750,438 Stewart Mar. 11, 1930 FOREIGN PATENTS Number Country Date 268,032 Great Britain Mar. 24, 1927 488,453 Great Britain July 7, 1938 

